Artificial tooth.



PATENTEID OCT. 11, 1 904. G. 0. KUSBL. ARTIFICIAL TOOTH. I APPLIGATIONFILED DEG .12. 190 3. 7

N0 MODEL.

WITNESSES ,4 TTORNEV.

UNITED STATES Patented October 11, 1904-.

PATENT OFFICE.

ARTIFICIAL TOOTH.

SPECIFICATION forming part of Letters Patent No. 772,104, dated October11, 1904.

Application filed December 12, 1903. Serial No. 184,957. (No model.)

To (ZZZ whom it may concern:

Be it known that I, GEORGE C. KosEL, a citizen of the United States,residing at Devon, in the county of Chester and State of Pennsyl- Vania,have invented a new and useful Artificial Tooth,of which the followingis a specification.

My invention relates to improvements in means for providing porcelain orother similar faces to metallic structures, and is especially adaptedfor use in connection with artificial-tooth crowns, my object being tosecure the porcelain face or other desired face or surface upon ametallic plate, which plate in turn is adapted to be secured to or havesecured to it the other portions of a desired structure.

In the accompanying drawings, Figure 1 is a vertical sectional view ofthe metal plate with the enameled facing suitable for a toothcrown onthe line 1 1 of Fig. 2. Fig. 2 is a horizontal section of the same. Fig.3 is a horizontal section with the balance of the tooth-crown filled in.Fig. 4 is a similar view as that shown in Fig. 3 with a variation inform of metal plate. Fig. 5 isa similar view with a straight metal plateinstead of a concave one. Fig. 6 is a vertical sectional view of thefinished tooth-crown. Fig. 7 is an elevation of the metal plates,showing crosshatching for more efficient engagement with the enamel.

Similar numerals refer to similar parts throughout the several views. I

My invention is particularly useful in connection with the constructionof crowns for artificial teeth.

A usual method of providing tooth-crowns with porcelain surfaces hasbeen to employ metallic pins embedded in said porcelain, to which pinsis secured the structure carrying the band or socket. These pins to havea suflicient hold must of necessity be embedded into a considerable massof enamel, from which it follows that the enamel crowns must be ofconsiderable thickness, so thick and massive, in fact, that they mustinvariably be grounddown and cut out to make room for the pin and otherportions of the structure which cooperate in the formation of thecomplete crown. Another method for providing enamel faces to porcelaincrowns has been to fuse the porcelain upon the perforated surface of acomplete hollow metallic crown. This method obviously implies that suchcrown must be especially constructed for its specific or individualcase. The purpose, therefore. of my invention is to obviate some of theobjections in both of the methods above alluded to.

I provide a thin metallic plate 1, preferably of metal melting only at avery high temperature. When intended for tooth-crowns, it may bedesirable to shape this plate as nearly as possible to correspond to thefront dimensions of the visible portion of the crown. I serrate,corrugate, or cross-hatch the outer or con vex surface 2 of thisplate-for example, as-shown in Fig. 7 then apply a thin coating 3, ofenamel or similar material, upon this convex surface of the plate, andthen subject the same to a heat sufficient to fuse the enamel to themetallic plate 1. Into the concave side of this plate 1 may be formedthe body 1 of the crown, composed of solder or other desired material,to which may be secured also the pin 5 for insertion in the root of thetooth and the band or socket 6 for surrounding said root of the tooth.In other words, this enamel-faced metallic plate 1 is readily adapted tohave the pin 5 and the band 6 secured directly and firmly to it withoutthe intermediate steps of first securing the metallic plate 1 to theenameled front 3 by means of pins embedded in said enamel, which must inturn be soldered to the metallic plate. Furthermore, the necessity isavoided of cutting or grinding away a large portion of said enameledcrown to make room for the pin 5 and other structure to be addedthereto. This is because the metallic plate 1 can be formed 'concave andof the desired dimensions and then treated with an extremely thincoating of enamel or other facing material, so that ample space is leftfor filling in with the body 4 of the crown and securing thereto the pin5 and the band 6, if such is required.

As shown in Figs. 2 and 3, the metallic plate 1 may be made of greaterdimensions than the enamel facing 3, so that the ends 7 and 8, whichproject from either side of the enamel 3, may be caused to embrace thebody 4, as shown in Fig. 3. Of course in some cases these correspondingends? and 8 may be omittedfor instance, as shown in Fig. 4and there maybe cases in which it is desirable to have the plate 1 straight and flat,as indicated in Fig. 5, instead of in the concave form.

For the purpose of securing a more substantial and eflicient cooperationbetween the metal and the enamel, porcelain, or other similar material Imay corrugate or in any other suitable way roughen the surface of themetal plate to which the porcelain or enamel is se- A cross-hatching isindicated at 2 in artificial denture requiring the application of anenameled surface to ametallic body or base.

Vhile I have described my device as ap plied to the construction ofartificial-tooth crowns, it is obvious that the invention may, bereadily applied to other structures comprising a metallic plate facedwith porcelain, enamel,or other similarmatcrial to which other portionsof the desired structure may readily be secured.

What I claim is 1. An article of manufactureconsisting of anartificial-tooth structure comprising athin metallic plate having afacing of enamel or other similar material fused to one side thereof andadapted to be secured to a supporting dental structure.

2. An artificial-tooth structure comprising a thin metallic plate havinga facing of enamel or other similar material fused to one side thereof,and a solid metallic body portion secured to the other side thereof.

GEORGE C. KUSEL. \Vitness es: 7

VILLIAM E. CHAPMAN, MAE HOFMANN.

